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A Route for Polymer Nanocomposites with Engineered Electrical Conductivity and Percolation Threshold

机译:具有工程电导率和渗透阈值的聚合物纳米复合材料的途径

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摘要

Polymer nanocomposites with engineered electrical properties can be made by tuning the fabrication method, processing conditions and filler’s geometric and physical properties. This work focuses on investigating the effect of filler’s geometry (aspect ratio and shape), intrinsic electrical conductivity, alignment and dispersion within the polymer, and polymer crystallinity, on the percolation threshold and electrical conductivity of polypropylene based nanocomposites. The conductive reinforcements used are exfoliated graphite nanoplatelets, carbon black, vapor grown carbon fibers and polyacrylonitrile carbon fibers. The composites are made using melt mixing followed by injection molding. A coating method is also employed to improve the nanofiller’s dispersion within the polymer and compression molding is used to alter the nanofiller’s alignment.
机译:具有电气特性的聚合物纳米复合材料可以通过调整制造方法,加工条件以及填料的几何和物理特性来制造。这项工作致力于研究填料的几何形状(长宽比和形状),固有电导率,聚合物中的排列和分散以及聚合物结晶度对聚丙烯基纳米复合材料的渗透阈值和电导率的影响。所使用的导电增强材料为片状石墨纳米片,炭黑,气相生长碳纤维和聚丙烯腈碳纤维。使用熔融混合然后注射成型来制造复合材料。还采用了涂覆方法来改善纳米填料在聚合物中的分散性,并使用压模法来改变纳米填料的排列。

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